feat(auth): Added authentication

frontend/src/Lib/Auth.ts

@@ -0,0 +1,13 @@
+import axios from "axios"
+import { apiUrl } from "./api"
+
+export interface Session {
+  sessionToken: string;
+  expiresOn: string;
+}
+
+export const logIn = async (username: string, password: string) => {
+  const response = await axios.post<Session>(`${apiUrl}/auth`, `username=${encodeURI(username)}&password=${encodeURI(password)}`);
+
+  return response.data;
+}